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Safety analysis of riveted bridges based on fracture mechanics
A simplified method of safety analysis of riveted bridges based on fracture mechanics is presented in this paper. First a new formula for the calculation of the fracture load of a bridge member with an assumed crack, has been derived from new FEM calculations (finite element method). Second a population of more than 400 experimental strength and fracture mechanic values derived from material taken from riveted bridges build between 1890 and 1930 has been evaluated statistically to derive characteristic distributions as a basis for the material input data of the fracture mechanic concept. Third, large scale tests with old bridge plates using the plane plate geometries described above bearing artifically produced cracks have been carried out to verify the proposed method by comparing predicted with experimental results. Fourth the new formula has been applied for modern structural steels with yield strength from 350 MPa to 890 MPa and large scale tests performed on large scale testing machine at the Institute of Ferrous Metallurgy in several research projects have re-evaluated to find out the quality of this approach.
Safety analysis of riveted bridges based on fracture mechanics
A simplified method of safety analysis of riveted bridges based on fracture mechanics is presented in this paper. First a new formula for the calculation of the fracture load of a bridge member with an assumed crack, has been derived from new FEM calculations (finite element method). Second a population of more than 400 experimental strength and fracture mechanic values derived from material taken from riveted bridges build between 1890 and 1930 has been evaluated statistically to derive characteristic distributions as a basis for the material input data of the fracture mechanic concept. Third, large scale tests with old bridge plates using the plane plate geometries described above bearing artifically produced cracks have been carried out to verify the proposed method by comparing predicted with experimental results. Fourth the new formula has been applied for modern structural steels with yield strength from 350 MPa to 890 MPa and large scale tests performed on large scale testing machine at the Institute of Ferrous Metallurgy in several research projects have re-evaluated to find out the quality of this approach.
Safety analysis of riveted bridges based on fracture mechanics
Sicherheitsanalyse von genieteten Brücken auf der Basis der Bruchmechanik
Dahl, W. (author) / Langenberg, P. (author)
Acta Metallurgica Sinica (Chinese Letters) ; 33 ; 175-186
1997
12 Seiten, 9 Bilder, 2 Tabellen, 7 Quellen
Article (Journal)
English
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